The USA's first commercial hydrokinetic turbine, which harnesses the power from moving water without the construction of a dam, has splashed into the waters of the Mississippi River near Hastings, Minnesota.
The 35-kilowatt turbine is positioned downstream from an existing hydroelectric-plant dam and — together with another turbine to be installed soon — will increase the capacity of the plant by more than 5 percent. The numbers aren't big, but the rig's installation could be the start of an important trend in green energy.
And that could mean more of these "wind turbines for the water" will be generating clean energy soon.
"We don't require that massive dam construction, we're just using the natural flow of the stream," said Mark Stover, a vice president at Hydro Green Energy, the Houston-based company leading the project. "It's underwater windpower if you will, but we have 840 or 850 times the energy density of wind."
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